The main difference between the Flesta air sterilisers is the area size that it is most efficient in.
Flesta Portable is designed to be brought on the go, whereas Flesta Refresh is suitable to be installed in small areas up to 15m² like elevators.
Flesta Protect is designed for indoor spaces and bathrooms up to 50m², whilst Flesta Purify is ideal for medium-sized offices, rooms or halls up to 100m².